JPH08265819A - Radio communication equipment and its connection method - Google Patents

Abstract

PURPOSE: To simplify the dialing by a radio communication equipment having plural communication paths connectable to an opposite communication equipment by selecting automatically other communication path when a communication path is not available for one contact so as to make dialing to an opposite radio communication equipment. CONSTITUTION: A cordless telephone set T1 has a base station CS being a master set and two mobile stations PS1, PS2 being slave sets, and the base station CS connects to a telephone line L. At first, the mobile station PS1 sends a dial signal to the mobile station PS2 directly not via the base station CS through a prescribed channel allocated for direct communication. The mobile station PS2 is in the standby state and a usual control channel and a channel allocated for direct communication to the mobile station PS1 are searched sequentially. When no reply is obtained from the mobile station PS2, the mobile station PS1 selects automatically the control channel allocated for extension communication and sends a dial signal to the base station CS.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wireless communication device such as PHS (Personal Handyphone System) which effectively uses a plurality of wireless communication paths and a connection method thereof.

[0002]

2. Description of the Related Art In a cordless telephone system, such as a PHS (Personal Handyphone System), in which a plurality of slave units can be set in addition to a master unit, a base station (master unit) connected to a communication network External line communication connected to the other terminal connected to the communication network through the base station (base station)
Other terminal (slave unit) connected to this base station via
There is extension communication that is connected to, and direct communication that directly communicates between terminals (slave units) without going through a base station or the like.

Among these communication paths, the extension communication and the direct communication are different in the channels (frequency) actually used for the communication, but are intended for the communication between the slave units which are terminals in the same system as the communication partners. I am trying. Therefore, the extension communication and the direct communication are different only in the communication path, and the user can perform communication with almost the same feeling.

That is, in extension communication, a partner radio communication terminal (slave unit) in the own system is called via a base station (master unit) using a slot of a predetermined channel. The partner wireless communication terminal pulls in the predetermined channel for a predetermined period, and the communication path is connected by responding to the call from the wireless communication terminal (slave unit) on the calling side. At this time, the base station (master device) and each wireless communication terminal (slave device) communicate using different slots.

In the direct communication, the partner wireless communication terminal (slave unit) in the own system is called by using the slot of the channel allocated for the direct communication. The partner wireless communication terminal pulls in the predetermined channel allocated for this direct communication for a predetermined period, and the communication path is connected by responding to the call from the wireless communication terminal (handset) on the calling side. . At this time, one slot is used between the respective wireless communication terminals (slave units).

In the communicable area, the communicable area of the base station (parent device) and the communicable area of the wireless communication terminal (child device) overlap each other, and the overlapped area is used by the base station or wireless communication. Since the terminal is present, the area where the wireless communication terminals can communicate with each other is larger in the area of the extension communication than in the direct communication.

[0007]

The communication paths for the above-mentioned extension communication and direct communication are manually selected and selected by the sender's will. Therefore, if there is no response from the partner wireless communication terminal after making a call on one communication path,
Alternatively, if the communication is rejected, it is necessary to manually switch to the other communication path again and then make a call again, which is a troublesome operation.

The present invention has been made in view of the above circumstances, and an object of the present invention is to simplify a calling operation in a wireless communication device having a plurality of communication paths connectable to a partner communication device. It is an object of the present invention to provide a wireless communication device and a connection method therefor.

[0009]

That is, according to the present invention, in a wireless communication device that connects to a partner communication device by using a plurality of communication paths, a call is transmitted by using a predetermined communication path among the plurality of communication paths. Means for transmitting by using a predetermined communication path by the transmitting means, and when it is not possible to connect to the partner communication device, the transmitting means is controlled to select and transmit another communication path different from the predetermined communication path. The transmission control means is provided.

[0010]

With the above-described structure, when a connection cannot be established through one communication path, the communication operation is automatically switched to another communication path to perform a call operation to the partner wireless communication device. Can be simplified to greatly improve operability, and a communication connection with a desired partner wireless communication device can be easily established.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to PHS will be described below with reference to the drawings. FIG. 1 shows the overall system configuration. T1 is a cordless telephone used in the X family. The cordless telephone T1 has one base station CS that is a master and two mobile stations PS1 and PS2 that are slaves, and the base station CS is connected to a telephone line L.

FIG. 2 shows a circuit configuration of the base station CS, where 1 is a CPU for controlling the operation of the entire base station CS,
A communication control unit 2 is connected to the CPU 1 and controls the communication with the mobile stations PS1 and PS2.

A speech codec section 3 and a radio section 6 are connected to the communication control section 2. Here, an antenna 7 is connected to the radio unit 6, and modulation of signals transmitted / received to / from the mobile stations PS1 and PS2 via the antenna 7,
Frequency conversion, burst control, etc. are performed based on demodulation and a control signal from the CPU 1.

The communication control section 2 extracts a control signal or a voice signal from the received signal from the radio section 6 at a predetermined timing, and also transmits a voice signal from the speech codec section 3 or a control signal from the CPU 1 at a predetermined timing. TDMA (time division multiplexing) processing for inserting into a signal and outputting to the radio unit 6 and transmission / reception of a control signal to / from the mobile stations PS1 and PS2 to connect / disconnect the mobile stations PS1 and PS2 to a communication line based on a predetermined procedure. And outputs a control signal to the CPU 1 and a voice signal to the speech codec unit 3.

A network interface 5 is connected to the speech codec section 3 via a PCM codec section 4,
A telephone line L is connected to the network interface 5.
The speech codec unit 3 performs compression / expansion processing of digital data. In the case of reception from the mobile stations PS1 and PS2, the speech codec section 3 decodes the ADPCM audio signal sent from the communication control section 2 into a PCM audio signal to perform decompression processing, and the PCM codec section 4
Output to. In the case of transmission to the mobile stations PS1 and PS2, the PCM voice signal sent from the PCM codec unit 4 is encoded into an ADPCM voice signal to be compressed and output to the communication control unit 2.

In the PCM codec section 4, analog /
Performs digital conversion processing. In the case of reception from the mobile stations PS1 and PS2, the PCM voice signal sent from the speech codec unit 3 is D / A converted and output to the network interface 5. In the case of transmission to the mobile stations PS1 and PS2, the analog voice signal sent from the network interface 5 is A / D converted to obtain a PCM voice signal.
The M audio signal is output to the speech codec unit 3.

The network interface 5 is an incoming call detection circuit, a dial pulse control circuit, a speech network, a DTM.
It is composed of an F transmission circuit and the like. This network interface 5 connects to the telephone line L like a normal telephone,
It controls incoming calls, dialing, and communication.

That is, the network interface 5 is the telephone line L.
When receiving from and sending to the telephone line L, the connection state (line connection / line disconnection) with the telephone line L is controlled based on the control signal from the CPU 1, and the line is connected to enter the call state. At this time, the analog voice signal from the telephone line L is set to P
The analog voice signal sent from the PCM codec unit 4 is sent to the CM codec unit 4 and the telephone line L
Send to.

On the other hand, the CPU 1 is connected with a key input unit 8, a slave unit information memory 9, an ID memory 10, a display unit 11 and a ringer 12, in addition to the communication control unit 2 described above.
The key input unit 8 has dial keys and other various function keys.

Information of the mobile stations PS1 and PS2 subordinate to the base station CS is stored in the slave unit information memory 9, and the PS-ID (Personal) of each of the mobile stations PS1 and PS2 is stored in the ID memory 10. Station-
ID) and the CS-ID (Cell St) of the base station CS itself.
ation-ID) is stored.

The display unit 11 is composed of, for example, a dot matrix type liquid crystal display panel, and displays a dial number or the like input by the key input unit 8. The ringer 12 generates a ring tone when the incoming detection circuit of the network interface 5 detects an incoming call from the outside.

FIG. 3 shows the circuit configuration of each of the mobile stations PS1 and PS2 in the cordless telephone T1. In the figure, 21 is a CPU for controlling the operation of the entire mobile station PS1 (PS2), and 22 is connected to this CPU 21,
It is a communication control unit that controls communication with the base station CS.

A speech codec section 23 and a radio section 26 are connected to the communication control section 22. Here, an antenna 29 is connected to the radio unit 26, and the antenna 2
Modulation and demodulation of the signal transmitted and received via 9 are performed.

The speech codec section 23 includes a PCM
An amplifier (AMP) 25 is connected via a codec unit 24, and a receiver speaker 26 and a transmission microphone 27 are connected to the amplifier 25.

The speech codec unit 23 carries out compression / expansion processing of digital data. In the case of reception from the base station CS, the speech codec unit 23 decodes the ADPCM voice signal sent from the communication control unit 22 into a PCM voice signal to perform expansion processing, and outputs it to the PCM codec unit 24. Also, in the case of transmission to the base station CS, the PCM sent from the PCM codec unit 24
The audio signal is encoded into an ADPCM audio signal to be compressed and output to the communication control unit 22.

The PCM codec section 24 performs analog / digital conversion processing. When receiving from the base station CS, P sent from the speech codec unit 23
The CM voice signal is D / A converted to obtain an analog voice signal, and the obtained analog voice signal is output to the amplifier 25 for amplification and output from the receiving speaker 26 in a loud voice. Further, in the case of transmission to the base station CS, the analog voice signal input from the transmitting microphone 27, amplified by the amplifier 25 and transmitted, is subjected to A / D conversion to obtain a PCM voice signal, and this PCM voice signal is obtained. Output to the speech codec unit 23.

On the other hand, in addition to the communication control unit 22 described above, the CPU 21 has a key input unit 30, a registration condition memory 31,
The ID memory 32, the display unit 33, and the ringer 34 are connected. The key input unit 30 has dial keys and other various function keys.

The registration condition memory 31 stores usage conditions for the base station CS, and the ID memory 32 stores the ID of the mobile station PS1 (PS2) itself.
The display unit 33 is composed of, for example, a dot matrix type liquid crystal display panel, and displays the dial number or the like input by the key input unit 30. The ringer 34 generates a ring tone when receiving a ringing signal from the base station CS.

Next, the operation of the PHS configured as above will be described. First, the operation in the case where the mobile station PS1 makes a call to the mobile station PS2 by direct communication, and since there is no response, the mobile station PS1 switches to the extension communication and makes another call will be described.

FIG. 4 shows a connection state between the mobile station PS1 and the base station CS and the mobile station PS2 in such a case. At the beginning of the connection, the mobile station PS1 is assigned a predetermined number for direct communication. The call signal is directly transmitted to the mobile station PS2 through the channel of (4) without passing through the base station CS (step A
-1).

At this time, the mobile station PS2 is in a standby state, and has a normal control channel assigned to the base station CS for external communication and extension communication, and a channel assigned to the mobile station PS1 for direct communication. Are being searched sequentially.

Here, as shown in FIG. 5, the mobile station PS1 is located in the communication area A2 of the mobile station PS2, and the mobile station PS2 is located in the communication area A1 of the mobile station PS1. If it is related, direct communication is possible.

However, as shown in FIG.
In the case where S1 is not located in the area A2 where the mobile station PS2 can talk and the mobile station PS2 is not located in the area A1 where the mobile station PS1 can talk, the direct communication becomes impossible. .

However, in step A-1, the mobile station P
When a call for direct communication is made from S1 to the mobile station PS2 and no response is obtained from the mobile station PS2 due to the positional relationship shown in FIG.
S1 automatically switches to the control channel assigned for extension communication and transmits a calling signal to the base station CS (step A-2).

In this case, as shown in FIG. 7, the base station CS is located within the communication area A1 of the mobile station PS1 and the mobile station PS1 is located within the communication area A3 of the base station CS. If relevant, the base station CS is mobile station PS
It is possible to receive the calling signal from

The base station CS which has received the call signal from the mobile station PS1 transmits a call signal to the mobile station PS2 through the control channel assigned to the extension communication (step A).
-3).

At this time, as shown in FIG. 7, the mobile station PS2
Is located within the communication area A3 of the base station CS, and the base station CS is located within the communication area A2 of the mobile station PS2, the mobile station PS2 is connected to the base station C.
A call signal from S can be received.

The mobile station PS2, which has received the call signal from the base station CS, transmits a response signal to the base station CS through the control channel assigned to the extension communication (step A-
4).

The base station CS receives the response signal from the mobile station PS2, and then the mobile station PS1 receives the response signal from the mobile station PS1.
A response signal indicating that there is a response from 2 is transmitted (step A-5).

Upon receiving the response signal from the base station CS, the mobile station PS1 recognizes that the mobile station PS2 has been connected to the mobile station PS2 via the base station CS by extension communication.
A telephone call by extension communication is executed via S.

Thus, as shown in FIG. 7, the mobile station PS
1 and the mobile station PS2 are both located within a callable area A3 of the base station CS, which is hatched in the figure, and the base station CS is within the callable area A1 of the mobile station PS1 and the call of the mobile station PS2. If the mobile station PS1 and the mobile station PS2 are in a positional relationship such that they cannot be directly communicated with each other as long as they are located in the area A2, they are automatically switched from direct communication to extension communication By making a call, it becomes possible to establish a connection and execute communication.

Next, an operation will be described in which the mobile station PS1 makes a call by extension communication to the mobile station PS2 via the base station CS, and since there is no response, the mobile station PS1 switches to direct communication and makes a call again.

FIG. 8 shows a connection state between the mobile station PS1 and the base station CS and the mobile station PS2 in such a case. At the beginning, the mobile station PS1 is assigned a predetermined number for extension communication. The call signal is transmitted to the base station CS through the channel of (step B-1).

In this case, if the relationship is such that the base station CS is located within the communication area A1 of the mobile station PS1 and the mobile station PS1 is located within the communication area A3 of the base station CS, The station CS can receive the calling signal from the mobile station PS1.

The base station CS which has received the calling signal from the mobile station PS1 transmits the calling signal to the mobile station PS2 through the control channel assigned to the extension communication (step B).
-2).

At this time, the mobile station PS2 is in a standby state, and the normal control channel assigned to the base station CS for external communication and extension communication and the channel assigned to the mobile station PS1 for direct communication. Are being searched sequentially.

However, when the mobile station PS2 is the base station CS
Of the base station CS
However, if the mobile station PS2 is not located within the area A2 where the mobile station PS2 can communicate, extension communication cannot be performed.

However, when the base station CS makes an extension communication call to the mobile station PS2 and no response is obtained from the mobile station PS2, the base station CS sends the mobile station PS1 to the mobile station PS2. The refusal signal indicating that the connection was impossible was transmitted (step B3).

The mobile station PS1 receiving this refusal signal automatically switches to the control channel assigned for direct communication and transmits a calling signal to the mobile station PS2 (step B-
4). Here, the mobile station PS2 is located in the area A1 where the mobile station PS1 can talk, and the mobile station PS1 is mobile station P1.
Direct communication is possible if the relationship is such that it is located within the area A2 in which the call of S2 is possible.

When the mobile station PS2 in the standby state receives the calling signal from the mobile station PS1 by the direct communication, it immediately transmits the response signal to the mobile station PS1 through the control channel assigned to the direct communication. (Step B
-5).

Upon receiving the response signal from the mobile station PS2, the mobile station PS1 recognizes that the connection by the direct communication with the mobile station PS2 is obtained, and thereafter, the mobile station P1 does not go through the base station CS.
A call is made by direct communication with S2.

In this way, the mobile station PS1 moves to the mobile station PS2.
Of mobile station PS2
Is located within the area A1 where the mobile station PS1 can talk, even if at least one of the mobile station PS1 and the mobile station PS2 cannot perform extension communication via the base station CS. Even if there is, by automatically switching from the extension communication to the direct communication and making a call, it becomes possible to connect and execute the communication.

In the above embodiment, the case where the number of base stations CS is one has been described, but if it is applied to a system having a plurality of base stations CS such as a business office PHS having a private branch exchange as shown in FIG. Even if it is difficult to perform direct communication between the mobile stations PS, by automatically switching to the extension communication via the base station CS and the extension communication network N, a further connectable area is greatly increased. Can be expanded.

In the above embodiment, the case where the present invention is applied to PHS has been described. However, the present invention is not limited to this, and any wireless communication system that uses a plurality of communication paths to connect to a partner communication device can be used. It goes without saying that it is applicable.

[0055]

As described above, according to the present invention, when a connection cannot be established through one communication path, another communication path is automatically switched to perform a call operation to the partner wireless communication device. It is possible to provide a wireless communication device and a connection method thereof that can simplify a complicated calling operation, greatly improve operability, and easily establish a communication connection with a desired partner wireless communication device.

[Brief description of drawings]

FIG. 1 is a block diagram showing a system configuration according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a circuit configuration of the base station shown in FIG.

FIG. 3 is a block diagram showing a circuit configuration of the mobile station of FIG.

FIG. 4 is a view for explaining the operation according to the embodiment.

FIG. 5 is a view for explaining the operation according to the embodiment.

FIG. 6 is a view for explaining the operation according to the embodiment.

FIG. 7 is a view for explaining the operation according to the embodiment.

FIG. 8 is a diagram for explaining the operation according to the embodiment.

FIG. 9 is a block diagram illustrating another system configuration according to the embodiment.

[Explanation of symbols]

 1, 21 ... CPU 2, 22 ... Communication control section 3, 23 ... Speech codec section 4, 24 ... PCM codec section 5 ... Network interface 6, 28 ... Wireless section 7, 29 ... Antenna 8, 30 ... Key input section 9 ... Handset information memory 10, 32 ... ID memory 11, 33 ... Display section 12, 34 ... Ringer 26 ... Receiving speaker 27 ... Transmitting microphone 31 ... Registration condition memory L ... Telephone line T1 ... Cordless telephone CS ... Base station (parent Machine) PS1, PS2 ... Mobile station (slave machine)

Claims (3)

[Claims] 1. A wireless communication device for connecting to a partner communication device using a plurality of communication paths, and a transmitting means for transmitting using a predetermined communication path among the plurality of communication paths, and a predetermined communication by the transmitting means. A transmission control means that controls transmission so that the transmission means selects another communication path different from the predetermined communication path when transmitting using a path and cannot connect to the partner communication device. Wireless communication device. 2. The transmission control means uses the transmission means to transmit using a predetermined communication path, and when a connection refusal signal is received from the predetermined communication path, the transmission means is configured to send the transmission means other than the predetermined communication path. The wireless communication device according to claim 1, wherein a communication path is selected. 3. A method of connecting a wireless communication device for connecting to a partner communication device using a plurality of communication paths, comprising: using a predetermined communication path among the plurality of communication paths, and then transmitting the predetermined communication path. A method of connecting a wireless communication device, characterized in that when the used connection is impossible, a call is sent to another communication path different from the predetermined communication path.